Cast Iron Round Pipe

About Cast Iron Round Downpipe

Cast iron round downpipe is the standard circular drainage pipe used with all profiles in the cast iron guttering range including half round, Victorian ogee, moulded ogee, beaded half round, deep half round, and box gutter. The most common downpipe profile on period UK properties. Supplied primed and ready for painting.

At Gutters.co.uk we stock the complete cast iron round downpipe range including pipe lengths, clips, shoes, bends, branches, and all fittings for fast UK delivery.

Cast Iron Round Downpipe Components

Round Downpipe Lengths available in 1.83m (6ft) lengths. Circular profile. Supplied primed.

Pipe Clips (Ears) wall fixing clips for securing the downpipe to the building. Cast iron ears are traditionally built into the mortar joints during construction.

Pipe Shoes fitted at the bottom of the downpipe to direct water away from the wall and into the drain.

Offset Bends used in pairs to create a swan neck, bringing the downpipe from the gutter outlet back to the wall face.

Bends used where the downpipe needs to change direction.

Pipe Branches allow two downpipes to merge into one.

Pipe Connectors used to join two lengths of downpipe in a straight run.

Rainwater Heads decorative collection points for gathering water from multiple sources into a single downpipe.

Cast Iron Round Downpipe Specifications

Profile: circular

Material: cast iron, supplied primed

Pipe lengths: 1.83m (6ft)

Standard: BS 460

Compatible gutter systems: all cast iron gutter profiles

Cast Iron Round vs Rectangular Downpipe

Cast iron downpipe is available in both round and rectangular profiles. Round is the most common and was used on the majority of domestic period properties. Rectangular was typically found on grander Victorian houses, public buildings, and commercial properties where a more formal appearance was desired. Both connect to the same gutter outlets. Choose based on what the original property had or the look you want to achieve.

Cast Iron vs Cast Aluminium Downpipe

Alumasc Heritage cast aluminium round downpipe is designed as a direct replacement. Cast aluminium weighs a third of cast iron, never rusts, never needs painting, and carries a 40 year guarantee. Cast iron requires painting every 3 to 5 years. Adaptors are available to connect the two systems if replacing part of an existing run.

Cast Iron Round Downpipe FAQ

Does cast iron downpipe need painting? Yes. Supplied primed, must be painted before installation and repainted every 3 to 5 years to prevent rust.

How heavy is cast iron downpipe? Significantly heavier than PVC or aluminium. Two people recommended for installation, especially at height.

How do I connect to underground drainage? Use a drainage adaptor to connect cast iron downpipe to standard 110mm underground drainage pipe.

Can I replace cast iron downpipe with aluminium? Yes. Alumasc Heritage cast aluminium is a direct replacement. Adaptors are available if connecting aluminium to remaining cast iron sections.

Can I replace cast iron downpipe with PVC? Yes, if the property is not listed. Use a pipe adaptor to connect PVC downpipe to an existing cast iron gutter outlet. The appearance will differ significantly.